Ecological variables.Results from the correlation tests
suggested that sambar pellet abundance had a strong negative
association with the distance to the Huai Kha Khaeng
River (r=−0.34, p<0.0001). Sambar pellets were negatively
associated with the occurrence of dry deciduous dipterocarp
forest (r=−0.16, p=0.001) and positively associated with
the average low slope patch size within a 600 m radius
(r=0.16, p=0.001) and 150 m radius of square transect centers
(r=0.14, p=0.004). Terrain ruggedness was discarded from
the variables tested because it was highly correlated with
slope (r=0.76) and slope was more correlated with pellet
group abundance. The remaining nine ecological factors
were deemed to be uniquely associated with pellet group
counts (Table 1). Following model selection, only three of the
ecological variables (dist. hkk, DD, and elev) were included in
the best-fit model (Table 2).
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